HN,
actually- its not really a parametric EQ. As you probably know using a parametric eq or plain eq in a room will result with 1 point having the desired eq but the other points likely not achieving anything close. What Meridian is doing, and I think it is very sophicistated, is trying to equalize the time each frequency is ringing. so for example, they will get 30hz to ring the same amount of time as 40hz. Every time it makes 1 correction, it creates a "filter". I believe the system is capable of up to 8 filters/ channel. I know someone who is truly an expert in acoustics and she tells me this approach is the most desirable. the way I would characterize the affect of MRC is that it will make a subtle, but noticeable improvement in the clarity of the bass, which somehow helps the clarity of the entire sound. I would not think it would "fix" a bad room, but I think if your room is a decent acoustic space it will help.

as far as setting it up- its easy. just plug a rca cable into a radio shack SPL meter and the other end into the analog input card in the 861 (you need an analog input card). you run the MRC software (part of the new Meridian setup software). when you run the software, it gives you 25 seconds to leave the room. you put the mic about where your head would be and leave. it runs test tones and then formulates the filters for each channel. I found I get slightly better results when I hold the mic near my head and sit in the chair. the test tones arent that loud. you can turn the RC on and off in any preset.

as you can tell, Im a fan. btw- the v4 upgrade to the 861 also includes much more computing power and the result is a really more refined sound before RC. hard as it is to believe because I was very impressed with v3.

Best regards,
Jerry
Main System: 861v6, DSP8000s in corners, DSP7000s Center and Sides, 1-9 humans.